body{
    width: 150px;
    height: 50px;
}
.option {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  border-radius: 10px;
}

.option .name {
  color: #333;
  font-size: 13px;
  font-weight: bold
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s
}

input:checked+.slider {
  background-color: #45c7d8
}

input:focus+.slider {
  box-shadow: 0 0 1px #45c7d8
}

input:checked+.slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px)
}

.slider.round {
  border-radius: 34px
}

.slider.round:before {
  border-radius: 50%
}
#myBox {
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 10px 20px;
  }
  #myBox #btn {
    padding: 3px 5px;
    cursor: pointer;
  }
  .record{
    display: flex;
  }
  .bookInfo{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }